Summary translation

400 hen´s eggs each from conventional and organic production were examined microbiologically. Neither Salmonella spp. nor Yersinia enterocolitica could be isolated. 1 % of the conventional and 0.25 % of the organic eggs hosted coagulase-positive Staphylococcus spp. on the shell. Campylobacter spp. was found in one sample of three pooled eggs from the organic production. The results of the examination of the general quality aspects made clear that organic eggs showed more often soilings than eggs from the conventional production. On the other hand cracked eggs were found more often in the conventional area, especially from hens out of cage housing systems. Altogether 13 % of the conventional and 12 % of the organic eggs exceeded standard values of selected coccidiostatics. Salmonella spp., Yersinia enterocolitica and Campylobacter spp. could not be isolated from 400 pork samples. Listeria monocytogenes and coagulase-positive Staphylococcus spp. were found regularly but did not exceed reference values. 53 % of the organic meat samples had an increased total aerobic count, for the conventional products the rate was 35.5 %. Also Enterobacteriaceae were found more often in higher numbers in organic products than in conventionally produced pork. Shiga-toxin producing E. coli (STEC) were isolated in one sample from the organic production. Furthermore half of the pork samples were tested on the content of selected antibiotics. None out of 100 examined organic and 4 out of 100 conventional samples contained one or more of the sought substances. The reference value of 100 µg/kg was not exceeded. With regard to the incidence of Toxoplasma gondii all meat samples, 129 organic and 133 conventional fermented sausages were examined. Organic pork samples (9 %) and fermented sausages (1.6 %) were more often positive with regard to antibodies against Toxoplasma gondii than the conventional pork (2.5 %) and fermented sausages samples (0 %). Neither in the organic nor the conventional fermented sausages (each 124 samples) Yersinia enterocolitica or Campylobacter spp. could be isolated microbiologically.